Day-Ahead Dispatch Optimization of Integrated Hydrogen-Electric System Considering PEMEL/PEMFC Lifespan Degradation and Fuzzy-Weighted Dynamic Pricing

Integrated hydrogen-electricity system(IHES) have gained widespread attention, yet distributed energy sources like photovoltaic(PV) and wind turbines(WT) power within them exhibit strong uncertainty and intermittency, posing key challenges of scheduling complexity and instability.Electricity price regulation, as a core mechanism in integrated IHES operation, can promote renewable energy absorption, optimize resource allocation, and enhance operational economy. However, uncertainties in IHES hinder accurate electricity price formulation, easily leading to delayed scheduling responses and increased cumulative operational costs.To address these issues, this paper establishes PEMEL and PEMFC models considering power-efficiency, incorporates their lifespan impacts into IHES scheduling, and integrates an electricity price regulation mechanism for energy imbalance. It constructs dynamic equations for the demand and response sides, scheduling electricity prices and IHES components via fuzzy weights and dynamic adjustment coefficients.Simulation results show that compared with fixed pricing, the proposed dynamic pricing reduces economic indices by an average of 15.3%, effectively alleviating energy imbalance and optimizing component energy supply. It also cuts PEMEL life attenuation by 21.59% and increases PEMFC utilization by 54.8%, providing theoretical and methodological support for efficient, stable IHES operation.